Conditions that make material harmful is that when it is used for harming/destroying/killing/polluting the environment and the people.
chemical toxicityradioactivityinfectious agentsetc.
The harmful effects of materials that are invented by technology are materials that are not biodegradable. This is because the materials are synthetic materials and cause destruction to the environment.
water which contains harmful materials is said to be
pollution
Toxic materials is a general description of anything which is poisonous or harmful to man, animals, plant life or the environment.
air pollution
The company suggests that Orbit gum wrappers not be eaten, but the wrappers contain no harmful materials or substances.
Pollution
Yes. Carcinogenic materials are harmful for the health because they can be precursors to development of Cancers in the body.
pollution
A lockable cupboard
i think its a panda bear